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#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	
	int n;
	cin >> n;
	vector<string> s(n);
	vector<int> a(n);
	
	for(int i = 0; i < n; i++) {
		cin >> s[i] >> a[i];
	}
	
	vector<int> qual;
	
	int cnt = 0;
	for(int i = 0; i < n; i++) {
		if(cnt == 20) break;
		if(s[i] == "NIE") continue;
		
		if(cnt < 10 || a[i] < 2) {
			qual.push_back(i+1);
			cnt++;
		}
	}
	
	for(int x : qual) {
		cout << x << " ";
	}
	cout << "\n";
	
	return 0;
}